S. Bertram

Application of hybrid analog and digital techniques in the automatic map compilation system

S. Bertram, 1963, AFIPS '63 (Spring).

The Degenerative Positive-Bias Multivibrator

S. Bertram, 1948, Proceedings of the IRE.

On the derivation of the fast Fourier transform

S. Bertram, 1970 .

Frequency analysis using the discrete Fourier transform

S. Bertram, 1970 .